CN111226613A - Hybrid power transmission system and method of tangential longitudinal flow threshing device and harvester - Google Patents

Hybrid power transmission system and method of tangential longitudinal flow threshing device and harvester Download PDF

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Publication number
CN111226613A
CN111226613A CN202010128742.8A CN202010128742A CN111226613A CN 111226613 A CN111226613 A CN 111226613A CN 202010128742 A CN202010128742 A CN 202010128742A CN 111226613 A CN111226613 A CN 111226613A
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motor
tangential
generator
super capacitor
engine
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CN111226613B (en
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唐忠
张奔
王美琳
李宇
李耀明
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Jiangsu University
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Jiangsu University
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/56—Driving mechanisms for the threshing parts
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • A01D41/127—Control or measuring arrangements specially adapted for combines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/18—Threshing devices
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/18—Threshing devices
    • A01F12/22—Threshing cylinders with teeth
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/58—Control devices; Brakes; Bearings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/18—Threshing devices
    • A01F2012/188—Rethreshing devices

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention provides a hybrid power transmission system and a hybrid power transmission method for a tangential and longitudinal flow threshing device and a harvester, wherein the hybrid power transmission system comprises a driving device, a transmission device, a tangential flow roller, a sensing device, a longitudinal flow roller and a control unit; the driving device comprises an engine, a generator, a super capacitor and a motor; the engine is connected with the generator; the motor is connected with the generator; the super capacitor is respectively connected with the motor and the generator; the generator, the super capacitor, the motor and the engine are connected in parallel on the tangential roller through a transmission device; the sensing device is used for measuring the SOC value of the super capacitor and the rotating speeds of the tangential flow roller and the longitudinal axial flow roller; the invention can make the motor drive to operate in time to supplement power when the running power of the threshing cylinder is insufficient; when the energy of the transmission system of the threshing device is excessive, the energy is recovered, the problem of instability of a threshing cylinder caused by sudden change of grain feeding amount is effectively solved, and the problems of blockage and stalk winding caused by sudden increase of grain feeding amount are effectively prevented.

Description

Hybrid power transmission system and method of tangential longitudinal flow threshing device and harvester
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to a hybrid power transmission system and method of a tangential longitudinal flow threshing device and a harvester.
Background
The threshing device is an important component of the combine harvester, and the threshing device has the main function of threshing and separating grains from the ears of crops. However, due to uneven planting and growth differences of grains, the combined harvester often has a situation that the grain feeding amount changes suddenly when the combined harvester is harvested. Because the threshing cylinder of the combine harvester runs at constant power, when the feeding quantity is suddenly changed in the threshing process, the problems of insufficient power of a transmission system of the threshing device, violent oscillation of the threshing cylinder, blockage of the threshing cylinder, breakage of a transmission chain after blockage and the like are easily caused, and the running smoothness of the threshing cylinder of the combine harvester and the service life of the transmission system of the threshing device are greatly influenced.
At present, in order to solve the problems of blockage of a threshing cylinder due to insufficient power and the like, the invention has the patent number CN201821769042.1 and discloses a cylinder concave plate sieve type threshing system with the winding and blockage prevention function. Patent No. CN201910662197.8 discloses an anti-clogging cylinder concave sieve plate threshing system, which comprises a machine shell, a threshing cylinder and a concave sieve plate, wherein the invention utilizes a belt pulley, a rotating shaft, an adjusting rod and a beating plate to beat the concave sieve plate in time to prevent clogging, and the invention can clear the clogging in a threshing gap and sieve pores of the concave sieve plate in time to achieve the purpose of continuous production. The patent No. CN201110145990.4 discloses a self-adaptive anti-clogging control system of a tangential and longitudinal flow combine harvester, which is a method for detecting the working load of a tangential and longitudinal flow threshing device by a host controller, detecting the rotating speed and the torque of a tangential flow roller and a longitudinal flow roller by a detection sensor in the threshing and separating process, calculating a variation deviation value, comparing and judging the variation deviation value with a pre-stored standard value, and controlling the working parameters of the threshing and separating device of the tangential and longitudinal flow combine harvester according to the variation of the rotating speed and the torque.
The invention can effectively prevent the blockage of the threshing cylinder, but the technical proposal solves the blockage problem of the threshing cylinder, can not keep the smoothness of the operation of the threshing cylinder, can not process the problem that the threshing performance of grains is seriously influenced by the vibration of the threshing cylinder, and the like.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems to a certain extent. The invention provides a hybrid power transmission system and a method of a tangential longitudinal flow threshing device, which can be used for driving a motor to operate in time to supplement power when the running power of a threshing cylinder is insufficient; when the energy of the transmission system of the threshing device is excessive, the energy is recovered, so that the running stability and smoothness of the threshing cylinder are ensured. The invention can effectively solve the problem of unstable threshing cylinder caused by sudden change of grain feeding amount when the threshing cylinder is in operation, and can effectively prevent the problems of blockage and stalk winding caused by sudden increase of grain feeding amount.
Therefore, the invention also provides a harvester of a hybrid power transmission system comprising the tangential and longitudinal flow threshing device.
The technical scheme of the invention is as follows: a hybrid power transmission system of a tangential-longitudinal flow threshing device comprises a driving device, a transmission device, a tangential-longitudinal flow roller, a sensing device, a longitudinal-longitudinal flow roller and a control unit;
the driving device comprises an engine, a generator, a super capacitor and a motor; the engine is connected with the generator through a transmission mechanism; the motor is connected with the generator; the super capacitor is respectively connected with the motor and the generator; the generator, the super capacitor, the motor and the engine are connected in parallel on the tangential roller through a transmission device;
the sensing device is used for measuring the SOC value of the super capacitor and the rotating speeds of the tangential flow roller and the longitudinal axis flow roller;
the control unit is respectively connected with the engine, the generator, the super capacitor, the motor and the sensing device;
the transmission device comprises a first transmission shaft, a first double-row chain wheel, a double-groove belt pulley, a transmission case and a second double-row chain wheel;
one end of the first transmission shaft is meshed with the end of the engine shaft; the other end of the first transmission shaft is connected with one end of the main shaft of the tangential flow roller through a first double-row chain wheel and a double-groove belt pulley; the other end of the main shaft of the tangential flow roller is connected with an output shaft of the motor through one end of the transmission case; the other end of the transmission box is connected with the front end of the main shaft of the longitudinal axial flow roller through the second double-row chain wheel;
furthermore, a first bevel gear, a second bevel gear and a third bevel gear are arranged in the transmission case; the first bevel gear is connected with an output shaft of the motor, the second bevel gear is connected with the other end of the main shaft of the tangential flow roller, and the third bevel gear is connected with the shaft end of the second double-row chain wheel;
the first bevel gear is meshed with the second bevel gear, and the second bevel gear is meshed with the third bevel gear.
In the scheme, the generator adopts a 65kw/13kw permanent magnet synchronous direct current motor.
In the scheme, the motor adopts a 60kw/120kw permanent magnet synchronous direct current motor.
In the scheme, the super capacitor adopts a 48V/165F capacitor.
A harvester comprises a hybrid power transmission system of the tangential longitudinal flow threshing device.
A control method of a hybrid power transmission system of the tangential-longitudinal flow threshing device comprises the following steps:
the sensing device respectively collects and measures the rotating speed T of the tangential flow roller1Speed of rotation T of longitudinal axial flow drum2The SOC value of the super capacitor is transmitted to the control unit;
the control unit is used for controlling the flow cutting roller according to the rotating speed T of the flow cutting roller1And the rotational speed T of the longitudinal axial flow drum2Obtaining the torque Trq required by the hybrid power transmission systemThe moment Trq and the SOC value are used as input variables of the fuzzy controller, the output variables are calculated to be coefficient parameters K through a fuzzy logic control strategy, and the control unit controls the work of the engine, the generator, the super capacitor and the motor according to the K value.
In the above scheme, the fuzzy logic control strategy specifically includes:
the discourse domain of K is [0,2],
when K is 2, the torque required by the hybrid power transmission system is larger than the torque provided by the engine, the control unit controls the generator and the super capacitor to discharge, the motor operates, and the motor and the engine provide the torque required by the system together;
when K is 1, the engine works at the optimal torque, the generator and the super capacitor do not discharge electricity, and the motor does not work;
when K is 0, the torque required by the hybrid power transmission system is smaller than the torque provided by the engine, the generator and the super capacitor are not discharged, and the electric motor converts the redundant mechanical energy into electric energy to be stored in the super capacitor.
In the above scheme, the control unit calculates the motor speed n according to the following formulam：
nm＝nm_min+K·Δn,K＝0,1,2
In the formula, nm_minFor the minimum allowable motor speed, Δ n is a discrete point equal division of the motor speed range into a series of discrete points.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can realize that when the feeding amount of the threshing cylinder is suddenly changed and if the power required by the threshing cylinder is more than the power of the engine, the super capacitor generates electricity to drive the motor to drive with assistance; if the power required by the threshing cylinder is less than the power of the engine, the surplus mechanical energy can be recycled to the super capacitor through the motor to charge the battery. The invention can maintain the running smoothness of the threshing cylinder and avoid the problems of vibration, blockage, stalk winding and even failure and the like of a transmission system of the threshing device caused by sudden change of feeding amount.
2. The invention adopts a parallel connection scheme to connect the generator, the super capacitor and the motor into the transmission system of the threshing device of the combine harvester, and the invention has the characteristics of minimal change of the transmission system structure of the original threshing device of the combine harvester, low cost, small technical difficulty, optimal compactness and minimal risk.
3. The invention utilizes the rotating speed sensor and the torque sensor to monitor the rotating speed and the torque of the tangential flow roller and the longitudinal axial flow roller in real time and feed back the rotating speed and the torque to the driver in time so that the driver can make adjustment in time, thus effectively processing the possible blockage problem of the threshing roller in time and increasing the continuous working capacity.
Drawings
Fig. 1 is a schematic view of an assembly structure according to an embodiment of the present invention.
Fig. 2 is a front view of an embodiment of the present invention.
Fig. 3 is a structural view of a transmission case according to an embodiment of the present invention.
FIG. 4 illustrates an energy delivery path according to an embodiment of the present invention.
FIG. 5 is a control strategy structure according to an embodiment of the present invention.
In the figure, 1-drive, 101-motor, 102-generator, 103-supercapacitor, 104-motor, 105-belt drive, 2-drive, 201-first drive shaft, 202-first double-row sprocket, 203-belt drive, 204-gear box, 2041-first bevel gear, 2042-second bevel gear, 2043-third bevel gear, 205-second double-row sprocket, 3-tangential flow drum; 4-sensing means, 401-first torque sensor, 402-first rotational speed sensor, 403-second torque sensor, 404-second rotational speed sensor; 5-cutting a longitudinal flow roller.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 1 and 2, a preferred embodiment of the hybrid power transmission system of the tangential/longitudinal flow threshing device of the present invention is shown, and the hybrid power transmission system of the tangential/longitudinal flow threshing device comprises a driving device 1, a transmission device 2, a tangential roller 3, a sensing device 4, a longitudinal axial flow roller 5 and a control unit;
the driving device 1 comprises an engine 101, a generator 102, a super capacitor 103 and a motor 104; the engine 101 and the generator 102 are connected through a transmission mechanism; preferably, the transmission mechanism is a belt transmission 105, and the generator 102 and the engine 101 are connected through the belt transmission 105; the motor 104 is connected with the generator 102; the super capacitor 103 is respectively connected with the motor 104 and the generator 102; the generator 102, the supercapacitor 103 and the electric motor 104 are formed as an electric drive which is connected in parallel with the engine 101 via the transmission 2 to the tangential drum 3.
The sensing device 4 comprises a voltage sensor, a first torque sensor 401 and a second torque sensor 402; the voltage sensor is used for measuring the state of charge (SOC) value of the super capacitor 103; the first torque sensor 401 is used to measure the rotational speed of the tangential flow drum 3, and the second torque sensor 402 is used to measure the rotational speed of the longitudinal flow drum 5.
The control unit is connected to the engine 101, the generator 102, the supercapacitor 103, the motor 104, the voltage sensor, the first torque sensor 401, and the second torque sensor 402, respectively.
According to the structural layout of most existing combine harvesters, the driving device 1 is preferably arranged at the right side of the tangential flow roller 3 and the longitudinal flow roller 5, and the sensing device 4 is arranged at the power input end of the main shaft of the tangential flow roller 3 and the longitudinal flow roller 5.
According to the structural layout of most existing combine harvesters, the generator 102 is preferably located at the rear side of the engine 101; the motor 104 is located on the rear side of the generator 102; a supercapacitor 103 is located in the middle of and connected to the left side of the generator 102 and the motor 104.
As shown in fig. 2, according to the present embodiment, it is preferable that the transmission 2 includes a first transmission shaft 201, a first double-row sprocket 202, a double-grooved pulley 203, a transmission case 204, and a second double-row sprocket 205; one end of the first transmission shaft 201 is meshed with the shaft end of the engine 101; the other end of the first transmission shaft 201 is connected with one end of a main shaft of the tangential flow roller 3 through a first double-row chain wheel 202 and a double-groove belt pulley 203; the other end of the main shaft of the tangential flow roller 3 is connected with an output shaft of the motor 104 through one end of the transmission case 204; the other end of the transmission case 204 is connected to the front end of the main shaft of the longitudinal axial flow drum 5 through the second double-row sprocket 205.
As shown in fig. 3, according to the present embodiment, it is preferable that a first bevel gear 2041, a second bevel gear 2042 and a third bevel gear 2043 are provided in the transmission case 204; the first bevel gear 2041 is connected with an output shaft of the motor 104, the second bevel gear 2042 is connected with the other end of the main shaft of the tangential flow roller 3, and the third bevel gear 2043 is connected with the shaft end of the second double-row chain wheel 205; the first bevel gear 2041 is meshed with the second bevel gear 2042, and the second bevel gear 2042 is meshed with the third bevel gear 2043.
According to the present embodiment, preferably, the sensing device 4 includes a voltage sensor, a first torque sensor 401 and a second torque sensor 402; the voltage sensor is used for measuring the state of charge (SOC) value of the super capacitor 103; the first torque sensor 401 is located at the right end of the main shaft of the tangential roller 3, and in the transmission case 204, the first torque sensor 401 is used for measuring the rotating speed of the tangential roller 3; the second torque sensor 402 is positioned at the front end of the main shaft of the longitudinal shaft flow roller 5, and the second torque sensor 402 is used for measuring the rotating speed of the longitudinal shaft flow roller 5;
according to the embodiment, preferably, the generator 102 adopts a 65kw/13kw type permanent magnet synchronous direct current motor, the motor 104 adopts a 60kw/120kw type permanent magnet synchronous direct current motor, the permanent magnet synchronous direct current motor has good maximum external characteristics, and the torque and the rotating speed of the motor are controlled by a variable voltage variable frequency vector control method.
According to the embodiment, the super capacitor 103 is preferably an 8-10 block 48V/165F capacitor.
As shown in fig. 4, according to the present embodiment, the hybrid power transmission system energy distribution route of the tangential longitudinal flow threshing device is preferably: one part of mechanical energy generated by the engine 101 is used for running of a transmission system of the whole machine, the other part of mechanical energy is used for generating electricity by the generator 102, the generator 102 converts surplus mechanical energy into electric energy, one part of electric energy is converted by an inverter and stored in the super capacitor 103 and is used for driving the motor 104 when necessary, the other part of electric energy is directly used for driving the motor 104, the motor 104 converts the electric energy into mechanical energy to assist in driving the transmission case 204, when the torque required by the hybrid power transmission system is smaller than the torque provided by the engine 101, the generator 102 and the super capacitor 103 do not discharge, and the motor 104 converts the surplus mechanical energy of the transmission case 204 into electric energy and stores the electric energy in.
A driver controls the motor 104 through the control unit according to real-time parameters provided by the sensing device 4, and when the rotating speed of the tangential flow roller 3 or the longitudinal flow roller 5 is increased and the torque is reduced, the motor 104 is controlled to store energy into the super capacitor 103; when the rotational speed and the torque of the tangential flow drum 3 or the longitudinal flow drum 5 are both normal, the motor 104 is in a rest state, and the first bevel gear 2041 rotates along with the second bevel gear 2042; when the rotating speed of the tangential flow roller 3 or the longitudinal flow roller 5 is reduced and the torque is increased, the motor 104 is controlled to assist in driving the transmission device 2.
The specific implementation process of the invention is as follows: when the threshing cylinder normally works, the engine 101 drives the first transmission shaft 201 to rotate, the first transmission shaft 201 drives the tangential flow cylinder 3 to rotate, and power is continuously transmitted to the longitudinal axial flow cylinder 5 through the transmission case 204 to drive the longitudinal axial flow cylinder 5 to rotate. At this time, the engine 101 drives the generator 102 to generate electricity and store the energy in the super capacitor 103 for the motor 104 to use. When the sensing device 4 detects that the rotating speed of the tangential flow roller 3 or the longitudinal flow roller 5 is reduced, the torque is increased, and a driver can control the motor 104 to start, wherein the motor 104 drives the first bevel gear 2041 at the shaft end to assist the rotation of the tangential flow roller 3 or the longitudinal flow roller 5; when the rotating speed of the tangential flow roller 3 or the longitudinal flow roller 5 is detected to be increased and the torque is detected to be reduced through the sensing device 4, the driver controls the motor 104 to recover energy and store the energy into the super capacitor 103; when the sensing device 4 detects that the rotation speed and the torque of the tangential flow roller 3 or the longitudinal flow roller 5 are normal, the super capacitor 103 is not operated, and at the same time, the first bevel gear 2041 at the shaft end of the motor 104 only rotates along with the second bevel gear 2042.
Example 2
A harvester comprising the hybrid drivetrain of the tangential longitudinal flow threshing device of the embodiment, thereby having the advantages of the embodiment 1, and the details are not repeated herein.
Example 3
A method of controlling a hybrid drivetrain of a tangential longitudinal flow threshing apparatus as described in embodiment 1, comprising the steps of:
as shown in fig. 5, the sensing devices 4 respectively collect and measure the rotation speed T of the tangential roller 31The rotational speed T of the longitudinal axial flow drum 52The SOC value of the super capacitor 103 is transmitted to the control unit;
the control unit is used for controlling the rotation speed T of the tangential flow roller 31And the rotational speed T of the longitudinal axial flow drum 52The torque Trq required by the hybrid power transmission system is obtained, the torque Trq and the SOC value are used as input variables of a fuzzy controller, an output variable is calculated to be a coefficient parameter K through a fuzzy logic control strategy, and a control unit controls the engine 101, the generator 102, the super capacitor 103 and the motor 104 to work according to the K value.
N in FIG. 5mFor motor speed, UCIs the generator voltage, UCeIs the super capacitor voltage, ngIs the generator speed, neIs the engine speed, npFor transmission speed, TpThe torque supplied to the drive train for the control signal, T being the torque measured by the torque sensor, TeIs the motor torque. The fuzzy controller measures the obtained T according to the sensing device 4rqAnd the SOC value outputs a K value, and the K value is calculated to obtain the rotating speed n of the motorm. Engine speed neAre respectively provided for the rotating speed n of the transmission system by control signal inputpAnd generator speed ngThe generator operates to obtain a voltage UCIs applied to a super capacitor, and the super capacitor applies a voltage UCeOn the motor. The motor transmits supplementary torque T to the transmission system according to the input signale。
According to this embodiment, preferably, the fuzzy logic control strategy specifically includes:
the input variable of the fuzzy controller is system required torque TrqAnd the super capacitor SOC value, and the output variable is represented by a coefficient parameter K. Because of the large input torque, a parameter T is introduced, wherein T is TrqA discourse domain of [0,2] for/600, T]0 denotes that the torque is 0, and 2 denotes the maximum required torque; the discourse domain of SOC is [0.4,0.8 ]]Representing operation of a supercapacitorUpper and lower limits; discourse domain of K is [0,2]]. The system demand torque Trq is the sum of the torque of the tangential flow roller 3 and the torque of the longitudinal flow roller 5, and the SOC value is the state of charge of the supercapacitor. The linguistic variable values are 5 levels of { negative large, negative small, zero, positive small and positive large }, and each linguistic variable adopts a triangular membership function;
empirically, the following fuzzy rules are established:
when K is 2, the torque required by the hybrid power transmission system is larger than the torque provided by the engine 101, the control unit controls the generator 102 and the super capacitor 103 to discharge electricity, the motor 104 operates and provides the torque required by the system together with the engine 101;
when K is 1, the engine 101 operates at the optimal torque, the generator 102 and the super capacitor 103 do not discharge, and the motor 104 does not operate;
when K is 0, the torque required by the hybrid power transmission system is less than the torque provided by the engine 101, the generator 102 and the super capacitor 103 are not discharged, and the electric motor 104 converts the excess mechanical energy into electric energy to be stored in the super capacitor 103.
According to the present embodiment, preferably, the control unit calculates the motor rotation speed n according to the following formulam：
nm＝nm_min+K·Δn,K＝0,1,2
In the formula, nm_minTo allow for a minimum speed of the motor 104, Δ n is a discrete point equal division of the range of speeds of the motor 104 into a series of discrete points.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (8)

1. A hybrid power transmission system of a tangential-longitudinal flow threshing device is characterized by comprising a driving device (1), a transmission device (2), a tangential-longitudinal flow roller (3), a sensing device (4), a longitudinal-longitudinal flow roller (5) and a control unit;
the driving device (1) comprises an engine (101), a generator (102), a super capacitor (103) and a motor (104); the engine (101) and the generator (102) are connected through a transmission mechanism; the motor (104) is connected with the generator (102); the super capacitor (103) is respectively connected with the motor (104) and the generator (102); the generator (102), the super capacitor (103), the motor (104) and the engine (101) are connected in parallel on the tangential roller (3) through the transmission device (2);
the sensing device (4) is used for measuring the SOC value of the super capacitor (103), the rotating speed of the tangential flow roller (3) and the rotating speed of the longitudinal axial flow roller (5);
the control unit is respectively connected with the engine (101), the generator (102), the super capacitor (103), the motor (104) and the sensing device (4);
the transmission device (2) comprises a first transmission shaft (201), a first double-row chain wheel (202), a double-groove belt wheel (203), a transmission box (204) and a second double-row chain wheel (205);
one end of the first transmission shaft (201) is meshed with the shaft end of the engine (101); the other end of the first transmission shaft (201) is connected with one end of a main shaft of the tangential flow roller (3) through a first double-row chain wheel (202) and a double-groove belt pulley (203); the other end of the main shaft of the tangential flow roller (3) is connected with an output shaft of the motor (104) through one end of the transmission case (204); the other end of the transmission box (204) is connected with the front end of the main shaft of the longitudinal axial flow roller (5) through the second double-row chain wheel (205);
a first bevel gear (2041), a second bevel gear (2042) and a third bevel gear (2043) are arranged in the transmission case (204); the first bevel gear (2041) is connected with an output shaft of the motor (104), the second bevel gear (2042) is connected with the other end of the main shaft of the tangential flow roller (3), and the third bevel gear (2043) is connected with the shaft end where the second double-row chain wheel (205) is located;
the first bevel gear (2041) is meshed with the second bevel gear (2042), and the second bevel gear (2042) is meshed with the third bevel gear (2043).
2. The hybrid power train of the tangential-longitudinal flow threshing device of claim 1, wherein the generator (102) is a 65kw/13kw permanent magnet synchronous dc motor.
3. The hybrid power train of the tangential-longitudinal flow threshing device of claim 1, wherein the electric motor (104) is a 60kw/120kw permanent magnet synchronous dc motor.
4. The hybrid drivetrain of a tangential-longitudinal flow threshing apparatus according to claim 1, wherein the super capacitor (103) employs a 48V/165F capacitor.
5. A harvester comprising the hybrid drivetrain of the tangential longitudinal flow threshing apparatus of any one of claims 1 to 4.
6. A method of controlling a hybrid drivetrain of a tangential longitudinal flow threshing apparatus according to any of claims 1-4, characterised by the steps of:
the sensing device (4) respectively collects and measures the rotating speed T of the tangential flow roller (3)1The rotational speed T of the longitudinal axial flow drum (5)2The SOC value of the super capacitor (103) is transmitted to the control unit;
the control unit is used for controlling the flow cutting roller (3) according to the rotating speed T of the flow cutting roller1And the rotational speed T of the longitudinal axial flow drum (5)2The method comprises the steps of obtaining torque Trq required by a hybrid power transmission system, taking the torque Trq and an SOC value as input variables of a fuzzy controller, calculating an output variable as a coefficient parameter K through a fuzzy logic control strategy, and controlling the work of an engine (101), a generator (102), a super capacitor (103) and a motor (104) by a control unit according to the K value.
7. The method of claim 6, wherein the fuzzy logic control strategy is specifically:
the discourse domain of K is [0,2],
when K is 2, the torque required by the hybrid power transmission system is larger than the torque provided by the engine (101), the control unit controls the generator (102) and the super capacitor (103) to discharge, the motor (104) operates, and the torque required by the system is provided together with the engine (101);
when K is 1, the engine (101) works at the optimal torque, the generator (102) and the super capacitor (103) are not discharged, and the motor (104) does not work;
when K is 0, the torque required by the hybrid power transmission system is smaller than the torque provided by the engine (101), the generator (102) and the super capacitor (103) are not discharged, and the electric motor (104) converts the redundant mechanical energy into electric energy to be stored in the super capacitor (103).
8. The method of claim 6, wherein the control unit calculates the motor speed n according to the following formulam：
nm＝nm_min+K·Δn,K＝0,1,2
In the formula, nm_minFor a minimum allowable motor speed of the motor (104), Δ n is a discrete point equal division of the range of motor (104) speeds into a series of discrete points.
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